Let the bread dough thaw out completely.
Roll the dough out on a floured surface to a 15" semi-rectangle. Does not have to be perfectly shaped.
In a small bowl, combine the brown sugar, granulated sugar, tablespoon cinnamon and give it a stir to mix.
Melt the 1/2 cup butter and brush it over the dough. Save a little melted butter to brush over the top of the rolls later.
Sprinkle the brown sugar and cinnamon mixture over the dough, covering the entire surface.
Starting from the top, tightly roll the dough to create a log shape. Roll it as tight as possible.
Cut 12 slices in the cinnamon roll log and place them in a buttered cast iron skillet.
Make sure they're separated because they will expand quite a bit while baking.
Brush the top of the rolls with the rest of the melted butter and bake in a preheated 350 degree oven for about 25-30 minutes.